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ST’s new audio amplifiers also enhances the audio performance of high-power boosters and integrates circuitry to allow continuous, undistorted playback in vehicles using stop-start engine technology, or in hybrid vehicles as the electrical traction drives and combustion engine switch between various operating modes.

As the first devices of their kind to feature an integrated digital input, the 4 x 135 W FDA4100LV, the 4 x 50 W FDA450LV and the 2 x 180 W FDA2100LV require no signal conversion or filtering circuitry, saving pc-board space and component count. In addition, engineering challenges such as EMI reduction are addressed inside the chips. ST’s patented feedback loop saves the need for a large output filter, and also allows use in diverse OEM and aftermarket products by reducing dependence on speaker type. Patented features reduce electro-magnetic interference with the tuner and also simplify end-product certification to automotive electromagnetic compatibility (EMC) standards CEI EN 55025 and ISO 11452-2 (2004).